Trolley.



Patented Sept. 2, I902. .1. w. snooxs.

T R D L L E Y (Application filed. Jan. 16, 1901 (N0 MUdel.)

1N VE N T 01?:

WITNESSES.-

' 'ATTORNEY.

THE NORRIS PETERS w, wnorouma. WASP'XNGT-ON, umv

UNITED STATES.

' PATENT OFFICE.-

JAMES W. BROOKS, OF INDIANAPOLIS, INDIANA.

- 'ER-QLLEY.

SPECIFICATION forming part of Letters Patent No. 708,198, dated. September 2, 1902. Application filed January 16, 1901. Serial N 43,437. (No model-J To all whom zit may concern:

Be it known that I, JAMES W. BROOKS, a citizen of the United States,residingatlndianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Trolleys; and I do de-" clare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to'the letters of reference marked thereon, which form a part of this specification.

My invention relates to the head at the extremity of the trolley-pole whereby the'trolley-wheel is carried; and the object is to im-, prove the trolley in its details of construction by providing a head having an antifrictional knuckle-joint which will enable the wheel to follow the trolley-wire reliably, particularly side elevation showing the trolleyin its rclation to a trolley-wire, a small portion of the, wheel-frame being broken away, Fig. 3, a fragmentary enlarged view showing the knuckle-joint in central section as on a line Y Y in Fig. 1, and Fig. 4' a fragmentary sectional detail viewers on a line'XX in Fig. 2.

Similar reference-letters in the several figures of the drawings indicate like parts.

In construction I provide a trolley-head comprising two principal parts A and B, connected together by an antifrictional knucklejoint, so that there may be no resistance to free movement about the axial pin. A may properly be designated the lower part and B the upper part of the head, and when in normal positions relatively they are both substantially in alinement with or straight extensions of the trolley-pole, so that the axis of the knuckle-pin crosses the axis of the pole at aright angle, and the axis of the wheel crosses the axis of the pole also at a right angle, but in a plane at a right angle to the plane of the knuckle-pin.

- The fixed part A has a stock A adapted for convenient attachment and is secured suitably to the trolley-pole A At the opposite end of the partAit has two blades aand a, between which is a blade I), attached to the moving part B. The blades (1 a have circular apertures provided with screw-threads e. In the apertures are adjustable ball-bearing cones E F, having screw-threadsf engaging the threads 6, and also having sockets h in their outer faces for use in adjusting the cones, The outer face of the coneE is preferably countersunk to receive the head 01 of the knuckle-pin J, which extends through the cones in suitable holes. The blade I) has two ball-bearing cups G and II rigidly secured in suitable recesses and arranged so as to oppose the cones, balls I beinginserted between the cones and the cups. The blade I) and the cups have togethera clearance-aperture d, through which the pin J extends. The pin J has aslight raised portionj adapted to be engaged by a wrench at the head i, and at the opposite end It it has screw-threads, on which is a screw-nut l, whereby to bind the ball-cones after having been adjusted. The stock A has an eye K, to which the trolley-rope may be connected.

The free end of the part B is bifurcated, so

that a pair of frame-blades O and G are provided, between which the trolley-wheel D is mounted on an axle L, secured in bosses w at the ends ofthe blades by cotters p.

At one side of the parts A and B are opposing separated abutments m and n, and at the opposite side are like abutments m and n, which limit the lateral movement of the part B relative to the part A. A plate-spring M at one side of the head is secured to the part A by removable screws N and extends across the abutments (which are at one side of the pin J) through an opening in the blade 0 to the hub of the wheel D, the end 0 of the spring having a slot working over the axle L. A counterpart spring M, secured by screws N to the opposite side of the part A, extends across the abutments m n and through an opening a in the bladeC to the hub of the wheel, the end having a slot 12, working over the axle L, and the parts bearing against the hub end, the parts t, however, preferably having an intervening lining P, adapted to resist wear and to be easily replaced when worn out. The springs M N, besides holding the two parts of the head in alinement ordinarily on a straight wire Z, also aid in forming a perfect electrical circuit. The bent parts q of the springs may move freely in the openings it.

In practical use the action of the knuckle will be understood from the foregoing description, the wheel following the wire without sufiicient restraint to cause it to mount the wire, while the springs keep the wheel in a straight path, yet permit action of the knuckle in the head when forced by the wheelflanges against the trolley wire when on curved portions thereof.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a trolley, the combination of the pivoted head part having the blades provided with the openings therein, the springs having the slots at the free ends thereof and extending through the openings in the blades, the axle extending through said slots and secured to said blades, and the trolley-wheel mounted on said axle between the ends of said springs that have the slots therein,said springs being secured at their opposite ends, substantially as set forth.

2. In a trolley, the combination of the pivoted head part having the blades provided with the openings therein, the springs having the slots at the free ends thereof and extending through the openings in said blades, the axle extending through said slots and secured to said blades near said openings, the trolleywheel mounted between the ends of said springs that have the slots therein, and the linings between the hub of said Wheel and said spring ends, the opposite ends of said springs being secured to the lower part of the head, substantially as set forth.

3. In a trolley, the combination with the two-part pivoted head having the trolleywheel mounted in the pivoted upper part thereof, of the combined guide-springs and electric conductors having bearing connections with the wheel hub and extending through the sides of the pivoted part to the other part of said head, substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES W. BROOKS.

Witnesses:

WM. II. PAYNE, E. T. SILVIUS. 

